Re: Trick for increasing speed of photo papers?

Loris, just for your information, since I don't think this is a viable
solution for your purpose:

Some 30 years ago I experimented with exposing B&W paper to mercury
vapors (in order to use it as a negative in a very old large format
camera). I noticed a strong increase in sensitivity, but also in
contrast. I never did systematic research though, and thus couldn't
quantify the process. What I did was to lock the paper in an airtight
box together with a "drop" of mercury of about 1cm diameter for 24
hours. There are probably better and more repeatable ways to do it.

Louis

Loris Medici wrote:
>
> Is there any trick that can be used to increase the sensivity of B&W
> photographic paper (by say... 2 or 3 stops for instance)
>
> TIA,
> Loris.
>
>
>
>
>
Received on Thu Nov 18 04:30:35 2004